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Research article - Peer-reviewed, 2020

Multiple Stressors in Aquatic Ecosystems: Sublethal Effects of Temperature, Dissolved Organic Matter, Light and a Neonicotinoid Insecticide on Gammarids

Bundschuh, Mirco; Zubrod, Jochen P.; Petschick, Lara L.; Schulz, Ralf


Whether and to which extent the effects of chemicals in the environment interact with other factors remains a scientific challenge. Here we assess the combined effects of temperature (16 vs. 20 degrees C), light conditions (darkness vs. 400 lx), dissolved organic matter (DOM; 0 vs. 6 mg/L) and the model insecticide thiacloprid (0 vs. 3 mu g/L) in a full-factorial experiment on molting and leaf consumption ofGammarus fossarum. Thiacloprid was the only factor significantly affecting gammarids' molting. While DOM had low effects on leaf consumption, temperature, light and thiacloprid significantly affected this response variable. The various interactions among these factors were not significant suggesting additivity. Only the interaction of the factors temperature and thiacloprid suggested a tendency for antagonism. As most stressors interacted additively, their joint effects may be predictable with available models. However, synergistic interactions are difficult to capture while being central for securing ecosystem integrity.


Amphipod; Feeding rate; Multiple stress; Leaf litter decomposition

Published in

Bulletin of Environmental Contamination and Toxicology
2020, volume: 105, number: 3, pages: 345-350
Publisher: SPRINGER

Authors' information

University of Koblenz-Landau
Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment
Zubrod, Jochen P.
Univ Koblenz Landau
Petschick, Lara L.
Univ Koblenz Landau
Schulz, Ralf
Univ Koblenz Landau

UKÄ Subject classification

Environmental Sciences

Publication Identifiers


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